Applied Acoustics Course - A.Y. 2018/2019

Calendar with link to PPT presentations, AVI audio-video recordings, notes and in-class tests

N.

Date

Time

Topic

Teacher

Presentation

Recording

Note

0

28/09/2018

14.30-15.40

Course introduction, visit to Casa del Suono

Michele
Ebri

HTML

AVI

 

1

05/10/2018

13.45-14.40

Nature of sound, fundamental physical quantities

Daniel Pinardi

PPT

AVI

DOC

2

14.50-15.35

Energy & Sound, scale of decibels

Daniel Pinardi

PPT

AVI

DOC

3

15.45-16.40

Human auditory system, loudness evaluation, weighting curves

Daniel Pinardi

PPT

AVI

DOC

4

12/10/2018

13.45-14.40

The Sound Level Meter, equivalent level, calibration, time history with different time constants (slow, fast, etc.)

Angelo Farina

PPT

AVI

5

14.50-15.35

Sum and subtraction of values in dB,  examples of dB summation, Spectral Analysis, FFT, octave bands, Bark bands

Angelo Farina

PPT

AVI

DOC

6

15.45-16.40

Free Field sound propagation, point sources, spherical divergence, directivity

Angelo Farina

PPT

AVI

DOC

7

19/10/2018

13.45-14.40

Linear sources, cylindrical divergence, excess attenuation

 

PPT

AVI

DOC

8

14.50-15.35

Noise screens, Maekawa formulas, examples

 

PPT

AVI

DOC

9

15.45-16.40

Indoor sound propagation, semi-reverberant field, critical distance

 

PPT

AVI

DOC

10

26/10/2018

13.45-14.40

Reverberation time, definition and Sabine's formula

 

PPT

AVI

DOC

11

14.50-15.35

Environmental correction factor K2, sound propagation inside not-Sabinian rooms.

 

PPT

AVI

DOC

12

15.45-16.40

Digital sampling of sound, digital filters, FFT, convolution in time and frequency domain

 

PPT

AVI

DOC

 

16:40-17:30

 First in-class test

 

 

 

 

13

09/11/2018

13.45-14.40

Measurement of impulse response: impulsive sources, microphones

 

PPT

AVI

DOC

14

14.50-15.35

Measurement of impulse response: loudspeakers, MLS and ESS methods 

 

PPT

AVI

DOC

 

15.45-16.40

 Practical experiments of IR measurements (*)

 

 

 

 

15

16/11/2018

13.45-14.40

ISO3382 standard, acoustical parameters: T20, T30, EDT, Clarity, Definition, Center Time, IACC, Jlf, G

 

PPT

AVI

DOC

16

14.50-15.35

Speech Transmission Index: measurement and calculation 

 

PPT

AVI

DOC

17

15.45-16.40

Sound absorbing materials, typical products. Example of measurement of Alpha Sabine according to ISO 354 (reverberant room)

 

PPT

AVI

DOC

18

23/11/2018

13.45-14.40

Sound insulating materials, typical products. Frequency dependence of the Sound Reduction Index R, the Mass law, resonances and coincidence.

 

PPT

AVI

DOC

19

14.50-15.35

Italian law about building acoustics (DPCM 5/12/1997), experimental assessment of compliance

 

PPT

AVI

DOC

20

15.45-16.40

Italian law about environmental noise (L. 447/1995), acoustical zoning, the new EC standards based on Lden - Results

 

PPT

AVI

DOC

 

16:40-17:30

 Second in-class test

 

 

 

 

21

30/11/2018

13.45-14.40

The Single Event Level (SEL) and its usage for evaluation of transportation noise

 

PPT

AVI

DOC

22

14.50-15.35

Examples and exercises regarding environmental noise

 


AVI


23

15.45-16.40

Examples and exercises regarding noise at the workplace

  AVI  

24

7/12/2018

13.45-14.40

Digital Sound Processing, FIR and IIR filters, FFT, aliasing, windows, spectrogram

  PPT
AVI
DOC

25

14.50-15.35

Fast convolution by FFT, partitioned convolution, computation of FIR coefficients for inverse filters, the Kirkeby inversion

  PPT
AVI
DOC

26

15.45-16.40

Measurement of the absorption coefficient: reverberant room, standing wave tube, sound intensity method, impulsive method 

 

PPT

AVI

DOC

 

16.40-17.30

 Third in-class test

 

 

 

 

27

14/12/2018

13.45-14.40

Techniques employed for sound recording and reproduction, mono, stereo, multichannel, 3D, the Soundfield microphone, Ambisonics

  PPT
AVI
DOC

28

14.50-15.35

Wave Field Synthesis (WFS), loudspeaker arrays, the Casa del Suono lab in Parma

  PPT
AVI
DOC

29

15.45-16.40

Microphone arrays, virtual microphones, the RAI project

  PPT AVI DOC

30

21/12/2018

15.45-16.40

Simulation of sound propagation  outdoors employing the DISIA/CITYMAP software package

  PPT
AVI
DOC

31

13.45-14.40

Simulation of sound propagation indoors employing the RAMSETE/AURORA software package

 


AVI
DOC

32

14.50-16.40

Final exercises, previous exam problems

 

HTML

   

 

16:40-17:30

 Fourth in-class test

 

 

 

 

The final results of the in-class tests of current year 2018/2018 will be available here at the end of the course (in January 2019)

(*) Warning: this activity involves very loud sound signals, so it is recommended to carry protective devices (earplugs, etc.) - it is also recommended to bring a recording device (laptop, smartphone, tablet) equipped with software capable of recording uncompressed WAV files.

Copyright (C) Angelo Farina – all the material posted here cannot be reproduced or broadcasted without authorization.
Last revision: 08 October 2018